Notes. Full width half maximum and luminosity L_Hβ are taken from the Hβ BLR model fit to the integrated quasar spectrum, from each of the two models shown in Figure 5. The models use the Park et al. (2022) iron template and have different assumptions in the assumed Hβ BLR shape (BPL and DG). There are four calculated BH masses for each model; using the 5100 Å luminosity of λL₅₁₀₀ = 1.76 × 10⁴⁶ erg/s (Equation (5)), and using the Hβ luminosity (Equation (6)), assuming the Greene & Ho (2005) (G) and Vestergaard & Peterson (2006) (V) empirical calibrations. The quoted measurement uncertainties do not include the uncertainties in the parameters a and b used in these calibrations or the scatter in the relations of 0.43 dex. The Eddington ratio λ_Edd = L_Bol/L_Edd is calculated for each of these BH masses, assuming a bolometric luminosity of $L_{\mathrm{Bol}}=1.63\times {10}^{47}\mathrm{erg}{\mathrm{s}}^{-1}$ from Yue et al. (2024). ^*The Vestergaard & Peterson (2006) Hβ-only masses are significantly larger than the three other estimates, and so we exclude these as outliers in our analysis, including them here only for reference.